I just got a new host and I'm now using LXAdmins, it has taken me a while to figure everything out, but there is one thing I can't figure out.

I can't send mail with PHP and mail() and I can't figure out why.

I guess the settings are in {Server Mail Settings}
"It is very essential that you set the my name to a properly resolvable hostname, since otherwise, many public mailservers like hotmail will reject mails from your server."

So it asks for "My name", do I just put any domain name there or what?
I tried with one of my .info-addresses but still didn't work.